Shaykh Ahmad

Shaykh Ahmad ibn Zayd al-Din bin Ibrahim al-Ahsa'i (May 1753-27 June 1834) was the founder of the Shaykhi school of Twelver Shi'ism during the 18th century.

Biography
Shaykh Ahmad ibn Zayd al-Din bin Ibrahim al-Ahsa'i was born in the al-Ahsa region of the eastern Arabian Peninsula in 1753, and he was educated in Bahrain and then at Najaf and Karbala in Iraq. He became a prominent Twelver Shia theologian, and his divergences from the mainstream Usuli school led to accusations of heresy and instances of persecution against him and his punishers. He spent the last twenty years of his life in Iran, and he died in 1836. His student Kazim Rashti succeeded him as the leader of Shaykhism.